ZDI-26-486: (Pwn2Own) Kenwood DNR1007XR tchdr_bytestream_read Out-Of-Bounds Write Code Execution Vulnerability
Kenwood DNR1007XR tchdr_bytestream_read Out-Of-Bounds Write Code Execution Vulnerability. This vulnerability allows physically present attackers to execute arbitrary code on affected installations of Kenwood DNR1007XR devices. Authentication is not required to exploit this vulnerability. The specific flaw exists within the tchdr_bytestream_read function. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-28980.
AI Analysis
Technical Summary
The Kenwood DNR1007XR device contains a vulnerability identified as CVE-2026-18269, involving an out-of-bounds write in the tchdr_bytestream_read function. This occurs because the device fails to properly validate user-supplied data, allowing attackers with physical access to write beyond the allocated buffer. This can be exploited to execute arbitrary code with root privileges without requiring authentication. The vulnerability was reported to Kenwood on February 3, 2026, and publicly disclosed on July 29, 2026. Kenwood has issued a firmware update to remediate this vulnerability.
Potential Impact
An attacker with physical access to the affected Kenwood DNR1007XR device can exploit this vulnerability to execute arbitrary code with root privileges. This can compromise the device's confidentiality, integrity, and availability. No authentication is required, increasing the risk if physical access controls are weak.
Mitigation Recommendations
Kenwood has released a firmware update that corrects this vulnerability. Users should apply the official firmware update available at https://www.kenwood.com/cs/ce/mm/firmware/2020/2020f/eng.html to remediate this issue. No other mitigations are specified.
ZDI-26-486: (Pwn2Own) Kenwood DNR1007XR tchdr_bytestream_read Out-Of-Bounds Write Code Execution Vulnerability
Description
Kenwood DNR1007XR tchdr_bytestream_read Out-Of-Bounds Write Code Execution Vulnerability. This vulnerability allows physically present attackers to execute arbitrary code on affected installations of Kenwood DNR1007XR devices. Authentication is not required to exploit this vulnerability. The specific flaw exists within the tchdr_bytestream_read function. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-28980.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Kenwood DNR1007XR device contains a vulnerability identified as CVE-2026-18269, involving an out-of-bounds write in the tchdr_bytestream_read function. This occurs because the device fails to properly validate user-supplied data, allowing attackers with physical access to write beyond the allocated buffer. This can be exploited to execute arbitrary code with root privileges without requiring authentication. The vulnerability was reported to Kenwood on February 3, 2026, and publicly disclosed on July 29, 2026. Kenwood has issued a firmware update to remediate this vulnerability.
Potential Impact
An attacker with physical access to the affected Kenwood DNR1007XR device can exploit this vulnerability to execute arbitrary code with root privileges. This can compromise the device's confidentiality, integrity, and availability. No authentication is required, increasing the risk if physical access controls are weak.
Mitigation Recommendations
Kenwood has released a firmware update that corrects this vulnerability. Users should apply the official firmware update available at https://www.kenwood.com/cs/ce/mm/firmware/2020/2020f/eng.html to remediate this issue. No other mitigations are specified.
Technical Details
- Article Source
- {"url":"http://www.zerodayinitiative.com/advisories/ZDI-26-486/","fetched":true,"fetchedAt":"2026-07-30T15:55:54.604Z","wordCount":193}
- Classification
- {"confidence":0.95,"severitySource":"cvss-text","classifier":"rss-v2"}
Threat ID: 6a6b74c49c2644c7f84cc1e3
Added to database: 07/30/2026, 15:59:00 UTC
Last enriched: 08/15/2026, 05:15:42 UTC
Last updated: 09/14/2026, 22:01:32 UTC
Views: 188
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.